NGC 917
| Galaxy NGC 917 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | triangle |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 26 m 07.7 s |
| declination | + 31 ° 54 ′ 44 ″ |
| Appearance | |
| Morphological type | Sab |
| Brightness (visual) | 13.7 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 2.5 ′ × 1.3 ′ |
| Position angle | 55 ° |
| Surface brightness | 14.8 mag / arcmin² |
| Physical data | |
| Redshift | 0.017972 ± 0.000033 |
| Radial velocity | 5388 ± 10 km / s |
|
Stroke distance v rad / H 0 |
(246 ± 17) · 10 6 ly (75.3 ± 5.3) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | November 22, 1827 |
| Catalog names | |
| NGC 917 • UGC 1890 • PGC 9258 • CGCG 504-079 • MCG + 05-06-039 • IRAS F02231 + 3140 • 2MASX J02260770 + 3154444 • LDCE 176 NED004 | |
NGC 917 is a spiral galaxy of Hubble type Sab in the constellation triangle at the northern sky . It is an estimated 246 million light years away from the Milky Way and has a diameter of about 180,000 ly.
In the same area of the sky are the galaxies NGC 931 and NGC 940 .
The Type Ia supernova SN 2002eh was observed here.
The object was on 22 November 1827 by the astronomer John Herschel using a 18.7-inch - telescope discovered.